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			pskey.c
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/*====================================================================*
 *
 *   Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or 
 *   without modification, are permitted (subject to the limitations 
 *   in the disclaimer below) provided that the following conditions 
 *   are met:
 *
 *   * Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 *   * Neither the name of Qualcomm Atheros nor the names of 
 *     its contributors may be used to endorse or promote products 
 *     derived from this software without specific prior written 
 *     permission.
 *
 *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE 
 *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE 
 *   COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND ANY EXPRESS OR 
 *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 
 *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
 *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *
 *   pskey.c - print prescaler key
 *
 *
 *   Contributor(s):
 *	Charles Maier &lt;cmaier@qca.qualcomm.com&gt;
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *   system header files;
 *--------------------------------------------------------------------*/

#include &lt;stdio.h&gt;
#include &lt;string.h&gt;
#include &lt;unistd.h&gt;
#include &lt;errno.h&gt;
#include &lt;sys/stat.h&gt;

/*====================================================================*
 *   custom header files;
 *--------------------------------------------------------------------*/

#include &quot;../tools/getoptv.h&quot;
#include &quot;../tools/number.h&quot;
#include &quot;../tools/types.h&quot;
#include &quot;../tools/error.h&quot;
#include &quot;../tools/files.h&quot;
#include &quot;../tools/flags.h&quot;
#include &quot;../key/HPAVKey.h&quot;
#include &quot;../key/SHA256.h&quot;
#include &quot;../pib/pib.h&quot;

/*====================================================================*
 *   custom source files;
 *--------------------------------------------------------------------*/

#ifndef MAKEFILE
#include &quot;../tools/getoptv.c&quot;
#include &quot;../tools/putoptv.c&quot;
#include &quot;../tools/version.c&quot;
#include &quot;../tools/fdchecksum32.c&quot;
#include &quot;../tools/hexdecode.c&quot;
#include &quot;../tools/hexstring.c&quot;
#include &quot;../tools/hexout.c&quot;
#include &quot;../tools/error.c&quot;
#endif

#ifndef MAKEFILE
#include &quot;../pib/pibfile1.c&quot;
#endif

#ifndef MAKEFILE
#include &quot;../key/SHA256Reset.c&quot;
#include &quot;../key/SHA256Write.c&quot;
#include &quot;../key/SHA256Block.c&quot;
#include &quot;../key/SHA256Fetch.c&quot;
#include &quot;../key/keys.c&quot;
#endif

/*====================================================================*
 *   program constants;
 *--------------------------------------------------------------------*/

#define PSKEY_VERBOSE (1 &lt;&lt; 0)
#define PSKEY_SILENCE (1 &lt;&lt; 1)

/*====================================================================*
 *
 *   static signed pskey (struct _file_ * pib);
 *
 *   compute the SHA256 digest of the PIB file prescalers and print
 *   the key with optional filename on stdout; the digest acts like
 *   a fingerprint;
 *
 *   assume that offset and extent are for ar7400 and change to 6400
 *   offset and extent when the PIB requires it;
 *
 *
 *--------------------------------------------------------------------*/

static signed pskey (struct _file_ * pib, off_t offset, void * memory, ssize_t extent, flag_t flags)

{
	struct sha256 sha256;
	byte digest [SHA256_DIGEST_LENGTH];
	struct pib_header pib_header;
	if (read (pib-&gt;file, &amp;pib_header, sizeof (pib_header)) != sizeof (pib_header))
	{
		return (-1);
	}
	if (pib_header.FWVERSION &lt; 0x05)
	{
		offset = INT_PRESCALER_OFFSET;
		extent = INT_PRESCALER_LENGTH;
	}
	if (lseek (pib-&gt;file, offset, SEEK_SET) != offset)
	{
		error (0, errno, FILE_CANTSEEK, pib-&gt;name);
		return (-1);
	}
	if (read (pib-&gt;file, memory, extent) != extent)
	{
		error (0, errno, FILE_CANTREAD, pib-&gt;name);
		return (-1);
	}
	SHA256Reset (&amp;sha256);
	SHA256Write (&amp;sha256, memory, extent);
	SHA256Fetch (&amp;sha256, digest);
	hexout (digest, sizeof (digest), '\0', 0, stdout);
	if (_allclr (flags, PSKEY_SILENCE))
	{
		printf (&quot; %s&quot;, pib-&gt;name);
	}
	printf (&quot;\n&quot;);
	return (0);
}

/*====================================================================*
 *
 *   int main (int argc, char const * argv [])
 *
 *
 *--------------------------------------------------------------------*/

int main (int argc, char const * argv [])

{
	static char const * optv [] =
	{
		&quot;lqrsv&quot;,
		&quot;file [file] [...]&quot;,
		&quot;print prescaler finger-print on stdout&quot;,
		&quot;q\tquiet mode&quot;,
		&quot;v\tverbose mode&quot;,
		(char const *) (0)
	};
	struct _file_ pib;
	uint8_t buffer [INT_PRESCALER_LENGTH];
	signed state = 0;
	flag_t flags = (flag_t) (0);
	signed c;
	optind = 1;
	while ((c = getoptv (argc, argv, optv)) != -1)
	{
		switch ((char) (c))
		{
		case 'q':
			_setbits (flags, PSKEY_SILENCE);
			break;
		case 'v':
			_setbits (flags, PSKEY_VERBOSE);
			break;
		default:
			break;
		}
	}
	argc -= optind;
	argv += optind;
	while ((argc) &amp;&amp; (* argv))
	{
		pib.name = * argv;
		if ((pib.file = open (pib.name, O_BINARY|O_RDONLY)) == -1)
		{
			error (0, errno, &quot;Can't open: %s&quot;, pib.name);
			state = 1;
			errno = 0;
		}
		else if (pibfile1 (&amp;pib))
		{
			error (0, errno, &quot;Bad PIB: %s&quot;, pib.name);
			state = 1;
		}
		else if (pskey (&amp;pib, INT_PRESCALER_OFFSET, buffer, sizeof (buffer), flags))
		{
			state = 1;
		}
		close (pib.file);
		argc--;
		argv++;
	}
	return (state);
}


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